Hyperlipidemia can be seen in:

Correct Answer: A

Rationale: Essential hypercholesterolemia and myxedema (hypothyroidism) cause hyperlipidemia; pheochromocytoma does not.

Correct Answer: C

Rationale: Hereditary spherocytosis leads to cholelithiasis from hemolysis and bilirubin stones.

Correct Answer: D

Rationale: Congenital heart disease with cyanosis causes polycythemia from hypoxia.

Correct Answer: C

Rationale: Hyperglycemia suppresses growth hormone release, unlike the others which stimulate it.

Correct Answer: A

Rationale: Obesity causes insulin resistance at fat cells, precipitating diabetes.